Story thread · 4 reports / 4 sources

Sleep app tracks link between air pollution and a bad night’s sleep

cam.ac.uk · 30mShare

Sleep app tracks link between air pollution and a bad night’s sleep Sarah Collins Tue, 09/15/2026 - 10:00 Researchers from the University of Cambridge, Tsinghua University and the sleep technology company Sleep Cycle analysed coughing sounds from 32 cities in 12 countries over 500 days, and found that higher daily air pollution levels were strongly linked to nighttime coughing levels, even where local pollution levels were below the World Health Organization’s recommended daily exposure limit. The researchers used cough sounds passively recorded by the mobile app via the phone’s microphone. Cough sounds were counted on individual devices and pooled by city to build an unprecedented dataset of this kind. The researchers accounted for external factors that could lead to an increase in coughing levels, such as weather conditions or influenza levels. Analysis of the data, which was anonymised, also found that when pollution levels rose by 10 micrograms of particulate matter per cubic metre

First report: Eight Sleep Pod 5 Core review: clever and genuinely useful — arabianbusiness.com, 2d